Zobrazeno 1 - 10
of 394
pro vyhledávání: '"M. Göckeler"'
Publikováno v:
Physics Letters B, Vol 774, Iss C, Pp 91-97 (2017)
Using the second moment of the pion distribution amplitude as an example, we investigate whether lattice calculations of matrix elements of local operators involving covariant derivatives may benefit from the recently proposed momentum smearing techn
Externí odkaz:
https://doaj.org/article/460f6fb518664172805c03752d25f07b
Akademický článek
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Autor:
M. Göckeler, R. Horsley, Paul E.L. Rakow, Arwed Schiller, Andreas Schaefer, Gerrit Schierholz, H. Perlt
Publikováno v:
Nucl.Phys.Proc.Suppl.
We present the non-forward quark matrix elements of operators with one and two covariant derivatives needed for the renormalisation of the first and second moments of generalised parton distributions in one-loop lattice perturbation theory using clov
Autor:
Gerrit Schierholz, Andreas Schäfer, Dirk Pleiter, Roger Horsley, M. Göckeler, Paul E.L. Rakow, Ph. Hägler, James Zanotti
Publikováno v:
Nucl.Phys.Proc.Suppl.
We present here the latest results from the QCDSF collaboration for (moments of) structure functions and generalized form factors in full QCD with Nf=2 O(a)-improved Wilson fermions based on simulations closer to the chiral and continuum limit.
Autor:
M. Göckeler, M. Gürtler, P. Hägler, R. Horsley, D. Pleiter, P.E.L. Rakow, A. Schäfer, G. Schierholz, W. Schroers, T. Streuer, J. Zanotti
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 135:156-162
Autor:
Balint Joo, Roger Horsley, D. Galletly, Gerrit Schierholz, Thomas Streuer, Holger Perlt, M. Gürtler, Arwed Schiller, Hinnerk Stuben, Dirk Pleiter, Brian Pendleton, M. Göckeler, Paul E.L. Rakow, Anthony D. Kennedy, T. Bakeyev
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 128:82-88
Results for nucleon matrix elements (arising from moments of structure functions) and form factors from a mixture of runs using Wilson, clover and overlap fermions (both quenched and unquenched) are presented and compared in an effort to explore the
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 119:32-40
The progress on the lattice computation of low moments of both the unpolarised and polarised nucleon structure functions is reviewed with particular emphasis on continuum and chiral extrapolations and comparison between quenched and unquenched fermio
Autor:
A. Schäfer, M. Göckeler, Dirk Pleiter, R. Horsley, Gerrit Schierholz, Stefan Schaefer, Paul E.L. Rakow
Publikováno v:
Nuclear Physics A. 711:291-296
Autor:
Vladimir M. Braun, R. Schiel, Sean P. Collins, M. Göckeler, A. Schäfer, Philipp Wein, A. Sternbeck, Wolfgang Söldner, B. Gläßle
Publikováno v:
Physical Review D. 89
We present the results of a lattice study of light-cone distribution amplitudes (DAs) of the nucleon and negative parity nucleon resonances using two flavors of dynamical (clover) fermions on lattices of different volumes and pion masses down to m_pi
Autor:
Bálint Joó, Alan C. Irving, Stephen Pickles, H. Stüben, Z. Sroczynski, M. Göckeler, Paul E.L. Rakow, R. Horsley, Stephen Booth, Gerrit Schierholz, Dirk Pleiter
Publikováno v:
Physics Letters B. 519(3-4):229-237
The scale parameter $\Lambda_{\overline{MS}}$ is computed on the lattice in the quenched approximation and for $N_f = 2$ flavors of light dynamical quarks. The dynamical calculation is done with non-perturbatively $O(a)$ improved Wilson fermions. In